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In vitro chemosensitivity test to predict chemosensitivity for paclitaxel, using human gastric carcinoma tissues

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Abstract

Background

Therapy guided by chemotherapy sensitivity and resistance assays may lead to rational treatment decisions. Paclitaxel, one of several new drugs for gastric carcinoma, has not been extensively evaluated by in vitro chemosensitivity tests.

Methods

Chemosensitivity testing by histoculture drug response assay (HDRA) was performed with fresh specimens of primary tumor from 113 patients with gastric carcinoma. The test was performed in medium containing paclitaxel at three different concentrations for the initial 45 samples. Correlations between the results of chemosensitivity testing, determined at the optimal concentration, and the patients' clinicopathologic factors and outcome were then assessed for all patients.

Results

By analyzing the initial 45 samples, 10 µg/ml was considered the optimal concentration of paclitaxel for this test. HDRA was successfully performed for 100 of 113 samples and chemosensitivity, calculated as the percentage of optical density of a tumor treated with anticancer drugs in relation to the optical density of the tumor cultured in the medium only, was distributed widely at this concentration. No significant correlation was observed between chemosensitivity and age, sex, clinical stage, histopathologic type, and outcome of patients with gastric carcinoma.

Conclusion

A histoculture drug response assay can now be performed to predict the chemosensitivity of paclitaxel at the concentration found in the current study. The accuracy of the assay to actually predict survival needs to be validated by a prospective clinical trial involving patients who have received paclitaxel in the postoperative adjuvant setting.

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Authors and Affiliations

  1. Department of Surgery II, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan

    Yasuhiro Kodera, Michitaka Fujiwara, Norifumi Ohashi, Yuichi Ito, Goro Nakayama, Masahiko Koike & Akimasa Nakao

  2. Department of Gastroenterological Surgery, Aichi Cancer Center, Nagoya, Japan

    Seiji Ito, Yoshinari Mochizuki & Yoshitaka Yamamura

Authors
  1. Yasuhiro Kodera
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  2. Seiji Ito
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  3. Michitaka Fujiwara
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  4. Yoshinari Mochizuki
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  5. Norifumi Ohashi
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  6. Yuichi Ito
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  7. Goro Nakayama
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  8. Masahiko Koike
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  9. Yoshitaka Yamamura
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  10. Akimasa Nakao
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Corresponding author

Correspondence to Yasuhiro Kodera.

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Kodera, Y., Ito, S., Fujiwara, M. et al. In vitro chemosensitivity test to predict chemosensitivity for paclitaxel, using human gastric carcinoma tissues. Int J Clin Oncol 11, 449–453 (2006). https://doi.org/10.1007/s10147-006-0618-x

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  • DOI: https://doi.org/10.1007/s10147-006-0618-x

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